Who believed that children are born a "blank slate? "a) gottfried leibniz b) plato c) john locke d) rené descartes

c. Jhon Locke

Explanation:

For Locke, human beings are born without any knowledge, therefore, the experience and perception are the unique tools available to reach knowledge. This idea differs of innatism, where the knowledge is already plunged to our mind.

i think its toxic gasses but i could be wrong

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.